Power Metal is the best sub genre of Metal. It's just a shame that the most famous Power Metal bands are boring as hell, the really interesting and creative ones aren't really well known.
John Myung's skills as a bassist are far more impressive than John Petrucci's skills as a guitarist. I just wish they'd turn Myungs's bass up.
Dream Theater is a little overrated, just a little.
Electric bass is far more interesting than electric guitar. I just wish it was valued more and turned up louder in lots of bands, you can do amazing things on a bass but in so many bands the bassist just writes some boring crap because they know it'll just be turned down low in the background so why bother writing anything good? Damn shame.
Oh, and Megadeth is so overrated it isn't even funny. Dave Mustaine sounds like a cat being strangled with razor wire and his guitar playing is pretty good, nothing special. I still enjoy some of their stuff, though.